Even on Christmas, Maxwell knows how to set the mood. The soul man smoothed things out by performing “Have Yourself a Merry Little Christmas” and “Silent Night,” backed by a choir, for TNT’s “Christmas in Washington” at the National Building Museum in D.C. The bespectacled star, looking dapper in a tux, joined President Obama and the First Family for the annual tradition in the nation’s capital. Watch him sing in the spirit of the season below.